Indian locomotive class WAP-1

Specifications
Configuration:;
• AAR	C-C
• UIC	Co′Co′
Gauge	5 ft 6 in (1,676 mm)
Bogies	Flexicoil (cast steel bogies); primary and secondary wheel springs with bolsters
Wheel diameter	New:1,092 mm (3 ft 7 in); Half worn: 1,055 mm (3 ft 5 1⁄2 in); Full worn: 1,016 mm (3 ft 4 in)
Length	18.794 m (61 ft 7 29⁄32 in)
Width	3.179 m (10 ft 5 5⁄32 in)
Height	4.272 m (14 ft 3⁄16 in)
Axle load	18,800 kg (41,400 lb)
Loco weight	112,000 kg (247,000 lb)
Electric system/s	25 kV 50 Hz AC Overhead
Current pickup(s)	pantograph
Traction motors	Alstom/CLW TAO 659
Loco brake	Air
Train brakes	Air,Dual
Safety systems	Slip control, Over voltage relay, Main overload relay, Earth Fault Relay, Low Pressure Governor, Brake Cylinder Cutoff Valve, Train parting alarms and No OHE volt relay

Type and origin
Power type	Electric
Builder	Chittaranjan Locomotive Works, West Bengal, India
Build date	1980-1996
Total produced	WAP-1: 65

WAP-1
	Arakkonam (AJJ) based WAP 1 Loco
Type and origin
Power type	Electric
Builder	Chittaranjan Locomotive Works, West Bengal, India
Build date	1980-1996
Total produced	WAP-1: 65
Specifications
Configuration:;
• AAR	C-C
• UIC	Co′Co′
Gauge	5 ft 6 in (1,676 mm)
Bogies	Flexicoil (cast steel bogies); primary and secondary wheel springs with bolsters
Wheel diameter	New:1,092 mm (3 ft 7 in); Half worn: 1,055 mm (3 ft 5 1⁄2 in); Full worn: 1,016 mm (3 ft 4 in)
Length	18.794 m (61 ft 7 29⁄32 in)
Width	3.179 m (10 ft 5 5⁄32 in)
Height	4.272 m (14 ft 3⁄16 in)
Axle load	18,800 kg (41,400 lb)
Loco weight	112,000 kg (247,000 lb)
Electric system/s	25 kV 50 Hz AC Overhead
Current pickup(s)	pantograph
Traction motors	Alstom/CLW TAO 659
Loco brake	Air
Train brakes	Air,Dual
Safety systems	Slip control, Over voltage relay, Main overload relay, Earth Fault Relay, Low Pressure Governor, Brake Cylinder Cutoff Valve, Train parting alarms and No OHE volt relay
Performance figures
Maximum speed	130 km/h (81 mph)
Power output	MAX:3900HP Continuous: 3,760 hp (2,804 kW)
Tractive effort	Starting : 22,400 kgf (220 kN; 49,000 lbf)
Career
Operators	Indian Railways
Numbers	22000-22076,Many being converted to WAP-4
Locale	All over India
Disposition	Active

The Indian locomotive class WAP-1 is a class of 25 kV AC electric locomotives that was developed in the 1980 by Chittaranjan Locomotive Works for Indian Railways. The model name stands for broad gauge (W), AC Current (A), Passenger traffic (P) engine, 1st generation (1). They entered service in 1980. A total of 65 WAP-1 were built at CLW between 1980 and 1996, which made them the most numerous class of mainline electric passenger locomotive till its successor the WAP-4.

The WAP-1 is India's first dedicated electric passenger locomotive of Indian Railways having served both passenger and freight trains for over 40 years. This class provided the basic design for a number of other locomotives like WAP-3 and WAP-4 models. However, with the advent of new 3-phase locomotives like WAP-5 and WAP-7, the WAP-1 locomotives were relegated to hauling smaller express and passenger trains and now the aging fleet the WAP-1 locomotives are being slowly withdrawn from mainline duties and scrapped.

As of January 2020, 55 locomotives still retain "operational status" on the mainline as WAP-1, with further examples having been converted to WAP-4.

History

Five prototype locomotives of this type were ordered from CLW to the design of RDSO. The first prototype locomotive was put into service in 1981.[1] They were first used on the Howrah Rajdhani Express.[2]

The locomotive is powered by six axle-hungs, nose-suspended forced ventilated type DC traction motors. Speed control is achieved by grouping in 2S-3P combination and by field weakening of the motor. It utilises a silicon rectifier for conversion of AC power into DC.[lower-roman 1][3]

They are being converted to make them suitable for multiple operation. Compressed air brake for the locomotives and vacuum brake for the train are provided. The brake system is being modified to make them suitable for dual brakes.

The WAP-1 provided the basis for the WAP-4.

Variants

The WAP-3 is the upgraded variant of the WAP-1 with better top speed. All units of this class were WAP-1 units already in service. The first locomotive converted was a WAP-1 '22005' named Jawahar. Subsequently 8 more WAP-1 were converted, But since the class were not a great success and had performance issues these were converted back to WAP-1.

Image gallery

2925 Paschim Express with a WAP-1
TKD WAP1 22006 RajHans at Katihar
WAP-1
AJJ WAP-1 with WAP-4 livery hauls Trivandrum bound Guwahati Express
AJJ WAP-1 in full WAP-4 livery.
12497 (NDLS-ASR) Shaan-e-Punjab Express with a WAP-1
WAP1 22076 Aastha of GZB with Agra bound ICE at LJN
WAP-1 with Raj Livery at Delhi

Locomotive sheds

Zone	Name	Shed Code	Quantity
Northern Railway	Tughlakabad	TKD(D)	31
Southern Railway	Erode	ED(D)	28
Total Locomotives Active as of 01-07-2020[4]			59

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References

The Great Indian Peninsula Railway EA/1 class of 1928 may disagree.

"[IRFCA] A Brief History of Railway Electrification in India". www.irfca.org. Retrieved June 19, 2019.
https://rdso.indianrailways.gov.in/works/uploads/File/raj-icf17.pdf
https://24coaches.com/electric-locomotive-roster-the-wap-series/
"e-Locos".

External links

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.

[3] The Great Indian Peninsula Railway EA/1 class of 1928 may disagree.

[1] "[IRFCA] A Brief History of Railway Electrification in India". www.irfca.org. Retrieved June 19, 2019.

[2] ttps://rdso.indianrailways.gov.in/works/uploads/File/raj-icf17.pdf

[4] ttps://24coaches.com/electric-locomotive-roster-the-wap-series/

[5] "e-Locos".